Truth Table/Functionality
Synchronous Write to Memory (all inputs registered) |
|||
|---|---|---|---|
inclock_a/inclock_b |
inclocken_a/inclocken_b |
wren_a/wren_b |
Function |
X |
L |
L |
No change. |
not |
H |
H |
No change. |
L |
X |
No change. |
|
H |
H |
The memory location pointed to by wraddress_a[]/wraddress_b[] is loaded with data_a[]/data_b[]. |
Synchronous Read from Memory |
|||
|---|---|---|---|
inclock_a/inclock_b |
inclocken_a/inclocken_b |
rden_a/rden_b |
Function |
X |
L |
L |
No change. |
| not |
H |
H |
No change. |
L |
X |
No change. |
|
H |
H |
The q_a[]/q_b[] port outputs the contents of the memory location. |
Totally asynchronous memory operations occur when neither inclock_a nor outclock_a is connected.
Asynchronous Memory Operations |
|
|---|---|
wren_a/wren_b |
Function |
L |
No change. |
H |
The memory location pointed to by wraddress_a[] is loaded with data_a[] and controlled by wren_a. The output q_a[] is asynchronous and reflects the memory location pointed to by rdaddress_a. |